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Yes, Zen Cart will run in a phpsuexec environment. However, you will need to work with your server administrator to determine the correct file-permissions mask to use for marking files read-only so that the "warning: configure.php files are writable" alert doesn't appear. Sometimes this may mean setting permissions as low as 444 or even 400. Your host should be able to help you with these limitations.

ISSUES WITH PHP.INI and .HTACESS FILES:If your host is running phpsuexec for security reasons, you will get a 500 Internal Error if you upload .htaccess files to your server while trying to control php settings.

If you are using .htaccess with php_ value_entries within it, you would receive an internal server 500 error when attempting to access the scripts, if you your host has phpsuexec installed.

This is because php is no longer running as an apache module and apache will not handle those directives
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What is Checksum Validation?

When downloading files from the internet, it's very important to verify that the file you downloaded IS in fact the file you EXPECTED to download.Authors of software typically zip up their software and then calculate a "checksum"
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(Windows servers "always" run PHP as a CGI app, so this FAQ may not apply to Windows hosts.)

While Zen Cart is "best" run on a server running PHP as an apache "module", some hosts only run PHP as a CGI application. There are generally more restrictions and limitations in functionality if this is how your PHP hosting is setup.